In both photos above, can be seen the former 9 (Plassey) BHQ when 12 Regt. was stationed there. The above photo shows a large hangar in the distance, this was near the RQMS and HQ (T/HQ) Bty. building. The JG 1 aircraft is outside the hangar that was situated where 12 RHQ would later stand.
Top photo, courtesy of FELDPOST. JG 1 FW 190 illustrations, insignias & other photos from other sources on the internet.